发明名称 |
Silica particle manufacturing process |
摘要 |
Methods of forming a silica-based products are disclosed. One method comprises: (a) providing a silica containing precursor (SCP) contained in solution that has a pH less than or equal to a pH of 7; (b) optionally doping the SCP with one or more metal species, wherein said doping occurs when the solution has a pH less than or equal to a pH of 7; (c) adjusting the pH of the solution to greater than 7; (d) adding an effective amount of salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS, wherein said addition occurs prior to, simultaneous with, or after the pH adjustment in step 1c; (e) optionally filtering and drying the SCP; and (f) optionally reacting the dried product from step e with a functional group and optionally wherein the resultant functionalized dried product is at least one of the following: a functionalized metal oxide-doped or metal sulfide-doped silica product. Another method comprises: (a) providing a silica containing precursor (SCP) contained in solution that has a pH greater than 7; (b) adjusting the pH of the solution to less than or equal to 7; (c) optionally doping the SCP with one or more metal species, wherein said doping occurs when the solution has a pH less than or equal to a pH of 7; (d) adjusting the pH of the solution to greater than 7; (e) adding an effective amount of salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS, wherein said addition occurs prior to, simultaneous with, or after the pH adjustment in step 2d; (f) optionally filtering and drying the SCP; and (g) optionally reacting the dried product from step f with a functional group and optionally wherein the resultant functionalized dried product is at least one of the following: a functionalized metal oxide-doped or metal sulfide-doped silica product. |
申请公布号 |
US8845991(B2) |
申请公布日期 |
2014.09.30 |
申请号 |
US201012756526 |
申请日期 |
2010.04.08 |
申请人 |
Ecolab USA Inc. |
发明人 |
Keiser Bruce A.;Ergang Nicholas S.;Mimna Richard;Showalter Brett M. |
分类号 |
C01B33/12;C01B33/141;C01B33/18 |
主分类号 |
C01B33/12 |
代理机构 |
Brinks Gilson & Lione |
代理人 |
Brinks Gilson & Lione |
主权项 |
1. A method of forming a silica-based product comprising:
(a) providing a silica containing precursor (SCP) contained in solution that has a pH less than or equal to a pH of 7; (b) doping the SCP with one or more metal species, wherein said doping occurs when the solution has a pH less than or equal to a pH of 7; (c) adjusting the pH of the solution to greater than 7; (d) adding an effective amount of exogenous salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS/cm, wherein said addition occurs after the pH adjustment in step 1c, wherein said addition results in a slurry of SCP; (e) optionally filtering and drying the SCP slurry; and (f) optionally reacting the dried product from step e with a functional group and optionally wherein the resultant functionalized dried product is at least one of the following; a functionalized metal oxide-doped or metal sulfide-doped silica product. |
地址 |
Naperville IL US |